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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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 Posted: Tue Jul 01, 2008 7:40 am Post subject: sasl doesn't work with postfix anymore |
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I noticed that when sending mail over my postfix, it doesn't require users to authenticate anymore, which isn't very good. Furthermore non local users can send mails over the postfix to other non local users, which again, is not good. http://www.abuse.net/relay.html however, tells me that there are no open relays. I still need people to authenticate when sending mails.
postconf -n gives
| Code: |
alias_database = hash:/etc/mail/aliases
alias_maps = hash:/etc/mail/aliases
body_checks = regexp:/etc/postfix/body_checks_map
body_checks_size_limit = 175000
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
debug_peer_level = 2
default_destination_concurrency_limit = 10
hash_queue_names = deferred, defer active bounce flush incoming
home_mailbox = .maildir/
inet_interfaces = all
local_destination_concurrency_limit = 2
local_recipient_maps = unix:passwd.byname $alias_maps
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain $mydomain
mydomain = mydomain.dk
myhostname = freya.mydomain.dk
mynetworks = 192.168.0.0/24, 127.0.0.0/8
mynetworks_style = subnet
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.0.9
relay_domains = $mydestination
sample_directory = /etc/postfix/sample
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_client_restrictions = hash:/etc/postfix/access, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client
smtpd_delay_reject = no
smtpd_helo_restrictions = reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, reject_unknown_helo_hostname
smtpd_recipient_restrictions = permit_sasl_authenticated, permit mynetworks, reject_invalid_hostname, reject_non_fqdn_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, reject_unauth_destination, reject_rbl_client zombie.dnsbl.sorbs.net, reject_rbl_client sbl.spamhaus.org, reject_rbl_client blackholes.easynet.nl, reject_rbl_client unconfirmed.dsbl.org, reject_rbl_client dynablock.njabl.org, reject_rbl_client dialup.blacklist.jippg.org, reject_rbl_client cbl.abuseat.org, reject_rhsbl_client blackhole.securitysage.com, reject_rhsbl_sender blackhole.securitysage.com, check_policy_service inet:127.0.0.1:2501 permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $mydomain
smtpd_sasl_security_options = noanonymous
smtpd_sender_restrictions = permit_mynetworks, hash:/etc/postfix/access, reject_rhsbl_sender dsn.rfc-ignorant.org
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550
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/etc/sasl2/smtpd.conf
| Code: | pwcheck_method:saslauthd
mech_list: plain login
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/etc/conf.d/saslauthd
| Code: |
# Config file for /etc/init.d/saslauthd
# Tilføjet af admin. SMTP AUTH
SASLAUTH_MECH=shadow
#SASLAUTH_MECH=pam
SASL_RIMAP_HOSTNAME=""
SASL_TIME_OF_DAY_LOGIN_RESTRICTIONS=yes
# Initial (empty) options.
SASLAUTHD_OPTS="-a ${SASLAUTH_MECH} -V"
# Specify the authentications mechanism.
# *NOTE* For list see: saslauthd -v
# From 2.1.19, add "-r" to options for old behavior
# ie. reassemble user and realm to user@realm form.
# SASLAUTHD_OPTS="${SASLAUTH_MECH} -a pam -r"
#SASLAUTHD_OPTS="${SASLAUTH_MECH} -a pam -V"
# Specify the hostname for remote IMAP server.
# *NOTE* Only needed if rimap auth mech is used.
#SASLAUTHD_OPTS="${SASLAUTHD_OPTS} -O localhost"
# Specify the number of worker processes to create.
#SASLAUTHD_OPTS="${SASLAUTHD_OPTS} -n 5"
# Enable credential cache, cache size, and timeout.
# *NOTE* Size is measured in kilobytes
# Timeout is measured in seconds
#SASLAUTHD_OPTS="${SASLAUTHD_OPTS} -c -s 128 -t 30"
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telnet mydomain.dk 25
| Code: |
telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 freya.mydomain.dk ESMTP Postfix
ehlo mydomain.dk
250-freya.mydomain.dk
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
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I must say, that i'm kinda baffled to why this doesn't work anymore. Postfix IS compiled with sasl support
Any help would be greatly appreciated
Del Pede |
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 12:12 pm Post subject: |
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helo..
I never do authentication with pam =(
but try modify this
add in /etc/sasl2/smtpd.conf
| Code: |
saslauthd_version: 2
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in /etc/conf.d/saslauthd uncomment that
| Code: |
#SASLAUTHD_OPTS="${SASLAUTHD_OPTS} -n 5"
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for teste authetication use
testsaslauthd |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 12:23 pm Post subject: |
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| cassiol wrote: | helo..
I never do authentication with pam =(
but try modify this
add in /etc/sasl2/smtpd.conf
| Code: |
saslauthd_version: 2
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in /etc/conf.d/saslauthd uncomment that
| Code: |
#SASLAUTHD_OPTS="${SASLAUTHD_OPTS} -n 5"
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for teste authetication use
testsaslauthd |
Didn't help me, unfortunately. I can still send mail, without being asked to authenticate. testsaslauthd gives me an ok, when testing with an valid user. So that seems to work. I've tried with starting sasl with both pam and shadow. Doesn't make a difference.
I discovered a script called saslfinger, and saslfinger -c gives me
| Code: | saslfinger -c
saslfinger - postfix Cyrus sasl configuration tir jul 1 14:22:37 CEST 2008
version: 1.0.2
mode: client-side SMTP AUTH
-- basics --
Postfix: 2.4.6
System: Gentoo Base System release 2.0.0
-- smtp is linked to --
libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0xb7b8d000)
-- active SMTP AUTH and TLS parameters for smtp --
No active SMTP AUTH and TLS parameters for smtp in main.cf!
SMTP AUTH can't work!
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Eventhough i have sasl config i my main.cf, it claims there is none. |
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 12:38 pm Post subject: |
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try modify that in /etc/postfix/main.cf
| Code: |
smtpd_sasl_local_domain = $mydomain
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replace
| Code: |
smtpd_sasl_local_domain
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and add that lines
| Code: |
smtpd_sasl2_auth_enable = yes
broken_sasl_auth_clients = yes
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in your mail program how you set username? |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 12:51 pm Post subject: |
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| cassiol wrote: | try modify that in /etc/postfix/main.cf
| Code: |
smtpd_sasl_local_domain = $mydomain
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replace
| Code: |
smtpd_sasl_local_domain
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and add that lines
| Code: |
smtpd_sasl2_auth_enable = yes
broken_sasl_auth_clients = yes
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in your mail program how you set username? |
I changed it so smtpd_sasl_local_domain = but it made no difference. I've sat up Thunderbird to authenticated against our smtp when sending mail, but i have disabled it. When i send mail via telnet, i don't get asked to authenticate either. What really puzzles me, is that saslfinger says: No active SMTP AUTH and TLS parameters for smtp in main.cf!
All the other suggestion you made, i allready have in my main.cf |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 1:10 pm Post subject: |
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| I think we have established, that saslauthd works. The problems seems to be, that postfix and sasl doesn't talk together. Or rather, it doesn't reject, or ask even, users that doesn't authenticate |
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 1:12 pm Post subject: |
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in your network not require authentication., because you have set permit_mynetwork.
try add permit_sasl_authenticated, in smtpd_sender_restrictions.
if that failed. please post error logs.
cat /var/log/messages | grep saslauthd |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 1:30 pm Post subject: |
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| cassiol wrote: | in your network not require authentication., because you have set permit_mynetwork.
try add permit_sasl_authenticated, in smtpd_sender_restrictions.
if that failed. please post error logs.
cat /var/log/messages | grep saslauthd |
I've added permit_sasl_authenticated in smtpd_sender_restrictions, and nothing has changed. There are no saslauthd entries in /var/log/messages |
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 1:31 pm Post subject: |
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| you have started saslauthd ??? |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 2:20 pm Post subject: |
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| cassiol wrote: | | you have started saslauthd ??? |
Yes, and it is working, according to testsaslauthd
Here are the full smtpd and sasl settings from main.cf
| Code: |
smtpd_sasl_auth_enable = yes
smtpd_sasl2_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain =
broken_sasl_auth_clients = yes
#smtpd_tls_auth_only = yes
smtpd_helo_restrictions = reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, reject_unknown_helo_hostname
#smtpd_client_restrictions = hash:/etc/postfix/access, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client
smtpd_client_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_delay_reject = no
#smtpd_sender_restrictions = permit_mynetworks, hash:/etc/postfix/access, reject_rhsbl_sender dsn.rfc-ignorant.org
smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_rhsbl_sender dsn.rfc-ignorant.org
smtpd_recipient_restrictions =
permit_sasl_authenticated,
permit mynetworks,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_unauth_pipelining,
reject_unauth_destination,
reject_rbl_client zombie.dnsbl.sorbs.net,
reject_rbl_client sbl.spamhaus.org,
reject_rbl_client blackholes.easynet.nl,
reject_rbl_client unconfirmed.dsbl.org,
reject_rbl_client dynablock.njabl.org,
reject_rbl_client dialup.blacklist.jippg.org,
reject_rbl_client cbl.abuseat.org,
reject_rhsbl_client blackhole.securitysage.com,
reject_rhsbl_sender blackhole.securitysage.com,
check_policy_service inet:127.0.0.1:2501,
reject
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 3:35 pm Post subject: |
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in smtpd_helo_restrictions add permit_sasl_authenticated,
if not work, please post postfix log. |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 3:55 pm Post subject: |
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| cassiol wrote: | in smtpd_helo_restrictions add permit_sasl_authenticated,
if not work, please post postfix log. |
Didn't work unfortunately. Here is the log from when i tried to mail, via telnet
| Code: |
Jul 1 17:51:03 localhost postfix/smtpd[17001]: connect from port91.ds1-abc.adsl.cybercity.dk[xxx.xxx.xxx.xxx]
Jul 1 17:51:30 localhost postfix/smtpd[17001]: warning: restriction `mynetworks' after `permit' is ignored
Jul 1 17:51:30 localhost postfix/cleanup[17018]: warning: regexp map /etc/postfix/body_checks_map, line 2: ignoring unrecognized request
Jul 1 17:51:30 localhost postfix/smtpd[17001]: 079B847CEF9: client=host.adsl.cybercity.dk[xxx.xxx.xxx.xxx]
Jul 1 17:51:48 localhost postfix/cleanup[17018]: 079B847CEF9: message-id=<20080701155130.079B847CEF9@freya.frivillighuset.dk>
Jul 1 17:51:48 localhost postfix/qmgr[16962]: 079B847CEF9: from=<peter@mailll.dk>, size=440, nrcpt=1 (queue active)
Jul 1 17:51:49 localhost postfix/smtpd[17001]: disconnect from hostcybercity.dk[xxx.xxx.xxx.xxx]
Jul 1 17:51:51 localhost postfix/smtp[17019]: 079B847CEF9: to=<delpede@anothermail.dk>, relay=mailgate.cybercity.dk[xxx.xxx.xxx.xxx]:25, delay=27, delays=24/0.01/0.67/2.3, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 07C5F19E0C2)
Jul 1 17:51:51 localhost postfix/qmgr[16962]: 079B847CEF9: removed
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Nothing indicates saslauthd being uses at all |
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 4:23 pm Post subject: |
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you need set smtp authentication in your mail program, or test out of your network, because you have set permit_mynetworks.
I not know how to test saslauthd, via telnet. |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 5:25 pm Post subject: |
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| cassiol wrote: | you need set smtp authentication in your mail program, or test out of your network, because you have set permit_mynetworks.
I not know how to test saslauthd, via telnet. |
I have smtp auth in my mail client, but i have disabled it. Still postfix doesn't ask me to authenticate, which is my main concern |
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cassiol
Guru
Joined: 16 Oct 2006
Posts: 304
Location: /BR/SC/FLORIPA
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| Posted: Tue Jul 01, 2008 5:51 pm Post subject: |
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please verify your master.cf
verify if exist in section smtps
| Code: |
-o smtpd_sasl_auth_enable=yes |
[/code] |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 5:57 pm Post subject: |
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| cassiol wrote: | please verify your master.cf
verify if exist in section smtps
| Code: |
-o smtpd_sasl_auth_enable=yes |
[/code] |
| Code: | smtp inet n - n - - smtpd
submission inet n - n - - smtpd
-o smtpd_sasl_auth_enable=yes
-o smtpd_sasl_security_options=noanonymous
-o smtpd_sasl_local_domain=freya.mydomain.dk
-o header_checks=
-o body_checks=
-o smtpd_client_restrictions=permit_sasl_authenticated,reject_unauth_destination
-o smtpd_sasl_security_options=noanonymous
#submission inet n - n - - smtpd
# -o smtpd_enforce_tls=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#smtps inet n - n - - smtpd
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#628 inet n - n - - qmqpd
pickup fifo n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr fifo n - n 300 1 qmgr
#qmgr fifo n - n 300 1 oqmgr
tlsmgr unix - - n 1000? 1 tlsmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
verify unix - - n - 1 verify
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
smtp unix - - n - - smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - n - - smtp
-o fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error unix - - n - - error
retry unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
anvil unix - - n - 1 anvil
scache unix - - n - 1 scache
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A bit messy it seems :-/ |
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darkphader
Veteran
Joined: 09 May 2002
Posts: 1038
Location: Motown
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| Posted: Tue Jul 01, 2008 6:00 pm Post subject: |
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Probably not your problem but just to note that I had some issues a week or so ago due to an openssl update, postfix would no longer authenticate via sasl to some mail servers. I remerged the packages depending on openssl including the ca-certificates and all was fine.
Chris |
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darkphader
Veteran
Joined: 09 May 2002
Posts: 1038
Location: Motown
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| Posted: Tue Jul 01, 2008 6:15 pm Post subject: |
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Looks like you're missing the proxywrite service in master.cf. Did you update postfix?
If so then stop postfix and run: | Code: | | postfix upgrade-configuration |
then restart it. It will add the missing service. |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 8:51 pm Post subject: |
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| darkphader wrote: | Looks like you're missing the proxywrite service in master.cf. Did you update postfix?
If so then stop postfix and run: | Code: | | postfix upgrade-configuration |
then restart it. It will add the missing service. |
After i did that, everything went wrong. Now postfix is an open relay, even though i personally think my restrictions are strict enough. For good measure, i'll post them again
| Code: | smtpd_sasl_auth_enable = yes
smtpd_sasl2_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain =
broken_sasl_auth_clients = yes
#smtpd_tls_auth_only = yes
smtpd_helo_restrictions = permit_sasl_authenticated, reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname, reject_unknown_helo_hostname
smtpd_client_restrictions = hash:/etc/postfix/access, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client
#smtpd_client_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_delay_reject = no
smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, hash:/etc/postfix/access, reject_rhsbl_sender dsn.rfc-ignorant.org
#smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_rhsbl_sender dsn.rfc-ignorant.org
smtpd_recipient_restrictions =
permit_sasl_authenticated,
permit mynetworks,
reject_invalid_hostname,
reject_non_fqdn_hostname,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_unauth_pipelining,
reject_unauth_destination,
reject_rbl_client zombie.dnsbl.sorbs.net,
reject_rbl_client sbl.spamhaus.org,
reject_rbl_client blackholes.easynet.nl,
reject_rbl_client unconfirmed.dsbl.org,
reject_rbl_client dynablock.njabl.org,
reject_rbl_client dialup.blacklist.jippg.org,
reject_rbl_client cbl.abuseat.org,
reject_rhsbl_client blackhole.securitysage.com,
reject_rhsbl_sender blackhole.securitysage.com,
check_policy_service inet:127.0.0.1:2501
permit
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 8:52 pm Post subject: |
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| darkphader wrote: | Probably not your problem but just to note that I had some issues a week or so ago due to an openssl update, postfix would no longer authenticate via sasl to some mail servers. I remerged the packages depending on openssl including the ca-certificates and all was fine.
Chris |
I'm reinstalling those package depending on openssl that involves postfix right now. Just to see if that might have anything to do with anything |
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darkphader
Veteran
Joined: 09 May 2002
Posts: 1038
Location: Motown
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| Posted: Tue Jul 01, 2008 9:21 pm Post subject: |
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| Del Pede wrote: | | After i did that, everything went wrong. Now postfix is an open relay, even though i personally think my restrictions are strict enough. |
That change is necessary and will not make your postfix an open relay. It's probably due to the trailing "permit" you have in smtpd_recipient_restrictions - it shouldn't be there (previously you had a "reject"). |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 9:25 pm Post subject: |
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| darkphader wrote: | | Del Pede wrote: | | After i did that, everything went wrong. Now postfix is an open relay, even though i personally think my restrictions are strict enough. |
That change is necessary and will not make your postfix an open relay. It's probably due to the trailing "permit" you have in smtpd_recipient_restrictions - it shouldn't be there (previously you had a "reject"). |
I have no doubt that the update was necessary. I used to have the permit before, but i tried with a reject to see if that would change anything. I've made some relay test with the permit in place. I've even had relay test, from abuse.org being succesfull, eventhough i could mail with and to non local users.
I'll give it a shot with removing the permit
EDIT: Didn't help unfortunately |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Tue Jul 01, 2008 9:40 pm Post subject: |
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| Seems i've solved the issue with being an open relay. It was an issue with smtpd_sender_restrictions and smtpd_delay_reject = no |
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Del Pede
Tux's lil' helper
Joined: 18 Aug 2005
Posts: 99
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| Posted: Wed Jul 02, 2008 8:37 am Post subject: |
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But things took a swing for the more weird late last night. At home, i disabled smtp auth in my mail client, and tried to mail via the mailserver, which is on a different IP and location, and relay'ing was rejected, untill i enabled smtp auth again. That was kinda good, but it didn't seem to ask for a password. What was even more peculiar, was that i weren't asked for any form of authentication, when telnet'ing to the smtp from home.
So to sumarize. Thunderbird from outside with out smtp auth - reject. Telnet to smtp from outside, not asked about authentication. Relay test says the server is secure |
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Networking & Security
